U20 USB Network interface

The U20 USB network interfaces for PCs connect LNS®-enabled integration and development tools to LonWorks® networks.

Key Features

  • Low-cost USB to LonWorks® (ANSI/CEA-709.1) network interface
  • Highest possible network throughput and performance
  • Rugged design, removable connectors
  • Plug-and-play drivers for Windows XP, 2000, and Server 2003
  • Functions as an LNS® High Performance Network Interface when used with LNS 3 and LNS Turbo Edition
  • Compatible with OpenLDVTM applications and the LonScannerTM Protocol Analyzer
  • CE, UL, cUL, and TÜV

Tech Specs


U20: PL-20 (ANSI/CEA-709.2 and LonMark standard channel type); EN50065.1 C-Band protocol software configurable

Network connector

U20: 2.1 mm barrel connector with positive tip. Wall plug coupling circuit/power supply included. May be connected directly to 10.8 – 18 Vdcpowerline or to customer supplied coupling circuit/power supply

Operating input voltage and current (U20 Interface)

  • Input voltage: 10.8 – 18 V DC at 2.1 mm barrel connector; powered line voltage varies with application
  • Input current: 250 mA maximum @ 18Vdc

Operating input current (U10 Interface)

50 mA maximum @ 5Vdc

USB compatibility

  • Certified USB 2.0 compatible
  • Compatible with USB 1.1 and high-speed USB systems, peripherals and cables

LED indicators

Service (amber), Transmit (green), Receive (green)


  • Operating: 0° to +70°C
  • Non-operating: -20° to +85°C


  • Operating (non-condensing): 25 to 90% RH @ + 50°C
  • Non-operating (non-condensing): 95% RH @ +70°C

Shock and vibration

ETSI300 019-2-3 T3.2


18.2 mm H x 113.2mm L x 22.4 mm W


FCC Part 15 level B, EN55022 Class B, EN55024, CISPR 22 Class B, VCCI Class B

Agency listings

UL 60950, cUL C22.2 60950-00, TUV EN 60950, CE, C-Tick


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